﻿using System;

using System.IO;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Navigation;

using System.Windows.Interop;

using System.Runtime.InteropServices;

using System.Collections.Generic;


namespace Sara
{

    public class GlassHelper
    {

        struct MARGINS
        {

            public MARGINS(Thickness t)
            {

                Left = (int)t.Left;

                Right = (int)t.Right;

                Top = (int)t.Top;

                Bottom = (int)t.Bottom;

            }

            public int Left;

            public int Right;

            public int Top;

            public int Bottom;

        }





        [DllImport("dwmapi.dll", PreserveSig = false)]

        static extern void DwmExtendFrameIntoClientArea(IntPtr hwnd, ref MARGINS margins);





        [DllImport("dwmapi.dll", PreserveSig = false)]

        static extern bool DwmIsCompositionEnabled();









        public static bool ExtendGlassFrame(Window window, Thickness margin)
        {

            if (!DwmIsCompositionEnabled())

                return false;





            IntPtr hwnd = new WindowInteropHelper(window).Handle;

            if (hwnd == IntPtr.Zero)

                throw new InvalidOperationException("The Window must be shown before extending glass.");





            // Set the background to transparent from both the WPF and Win32 perspectives

            SolidColorBrush background = new SolidColorBrush(Colors.Red);

            background.Opacity = 0.5;

            window.Background = Brushes.Transparent;

            HwndSource.FromHwnd(hwnd).CompositionTarget.BackgroundColor = Colors.Transparent;





            MARGINS margins = new MARGINS(margin);

            DwmExtendFrameIntoClientArea(hwnd, ref margins);

            return true;

        }

    }

}
